WorksheetsMole Calculations
Total questions: 20
Worksheet time: 48mins
Name
Class
Date
1.
2H2 + O2 −−〉 2H2O
8.3 moles H2 −−〉 ? moles H2O
8.3 moles H2 −−〉 ? moles H2O
a)
4.15
b)
8.3
c)
16.6
d)
74.04
2.
If you are going from grams of Na to grams of NaCl, what label is going to be on the bottom of the first step?
2Na + Cl2 −−〉 2NaCl
2Na + Cl2 −−〉 2NaCl
a)
Grams Na
b)
Grams NaCl
c)
Moles Na
d)
Moles NaCl
3.
How many particles are in 13.5 grams of Beryllium?
a)
1.5 particles
b)
9 particles
c)
4x1023 particles
d)
9x1023 particles
4.
2 NaClO3 (s) --> 2NaCl (s) + 3 O2 (g)
12.00 moles of NaClO3 will produce how many grams of O2?
12.00 moles of NaClO3 will produce how many grams of O2?
a)
256 g of O2
b)
576 g of O2
c)
288 g O2
5.
2CO + O2 −-> 2CO2
How many liters of carbon dioxide are produced from 10L of carbon monoxide?
How many liters of carbon dioxide are produced from 10L of carbon monoxide?
a)
10
b)
20
c)
1
d)
5
6.
N2 + 3H2 −-> 2NH3
How many moles of ammonia are produced when 3 moles of nitrogen react with hydrogen?
How many moles of ammonia are produced when 3 moles of nitrogen react with hydrogen?
a)
6 moles Ammonia
b)
1.5 moles ammonia
c)
9 moles ammonia
d)
9 moles hydrogen
7.
Mole ratios are obtained from the
a)
balanced chemical equation
b)
periodic table
c)
molar mass
8.
Calculate the number of gold atoms in a 4 mole sample of gold.
a)
2.41x1024
b)
3.01x1023
c)
4.82x1024
d)
6.02x1023
9.
Calculate the mass of iron in a sample of iron ore containing 2.61x1023 iron atoms.
a)
0.433g
b)
24.2g
c)
44g
d)
6.02g
10.
Calculate the number of moles of Aluminum in a 2.04 mole sample of aluminum oxide, Al2O3.
a)
2.04 moles
b)
4.08 moles
c)
6.12 moles
d)
1.02 moles
11.
Calculate the mass of oxygen present in a 55g sample of Aluminum oxide, Al2O3.
a)
29.28
b)
19.95
c)
11.36
d)
32.33
12.
Calculate the % composition by mass of oxygen present in H2SO4.
a)
16.3%
b)
65.25%
c)
32.6%
d)
57.14%
13.
Calculate the number of oxygen atoms present in 14kg of Ba(NO3)2
a)
53.578 atoms
b)
3.22x1025 atoms
c)
3.22x1022 atoms
d)
6.44x1022 atoms
14.
What is the molarity of 2.5 mol of NaOH in 12.0 L of solution?
a)
0.21 M
b)
30 M
c)
4.8 M
d)
20.8 M
15.
What is the empirical formula of a compound if the molecular formula is W18O9?
a)
W18O9
b)
W2O
c)
W6O3
d)
none of the above
16.
Which represents the greatest mass of sulfur?
a)
1 gram of sulfur
b)
1 molecule of sulfur
c)
0.5 mole of sulfur
d)
6.02 x 1023 atoms of sulfur
17.
What is the empirical formula if you have 81.82% carbon and 18.18% hydrogen?
a)
C3H8
b)
CH4
c)
C2H2
d)
C4H10
18.
C2H6
a)
Empirical
b)
Molecular
19.
You have 286.7g of PbO. For lab, you need 2.50M PbO. What volume of PbO can you make?
a)
0.5140mL
b)
554 mL
c)
514 mL
d)
0.554 L
20.
What is the molar mass of calcium hydroxide, Ca(OH)2?
a)
74.1 g/mole
b)
57.1 g/mole
c)
58.1 g/mole
d)
none of the above
100 %
